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Climate almanac

Jacksonville

Illinois, United States · 39.73°, -90.23°

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What is the weather like in Jacksonville in July?

In July, Jacksonville is typically 86°F (30°C) during the day and 69°F (21°C) at night. The month brings about 5.3 in (134 mm) of precipitation in total.

  • Average high86°F (30°C)
  • Average low69°F (21°C)
  • Precipitation5.3 in (134 mm)
  • Clear or mostly clear days11
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)